LTE多頻段手機MIMO天線設(shè)計研究
[Abstract]:With the maturity of 3G mobile communication network and the rapid development of 4G LTE (Long Term Evolution) network, smart phone is more widely used. Under the current communication system, the mobile phone antenna not only can effectively cover the working frequency band of the new standard LTE, but also can be compatible with the 3G / 2G communication band at the same time, so the broadband design has become an inevitable requirement. At the same time, the LTE standard uses multi-input multi-output (MIMO) multi-antenna technology, which means that the design area provided to a single antenna will be smaller. Due to the limited size of the mobile phone, there will be strong electromagnetic coupling between the MIMO antenna elements, which will reduce the efficiency of the antenna, reduce the radiation diversity of the antenna elements, and affect the communication efficiency of the system. As a handheld wireless device, the antenna of mobile phone is influenced by human body, so it is important to study the interaction between mobile phone and human body. In view of this, this paper studies the frequency band expansion technology of MIMO antenna unit, decoupling technology between MIMO antenna elements, and the interaction between antenna and human body. The main contents include: firstly, this paper investigates the research background of mobile phone antenna and the development situation at home and abroad, classifies the mobile phone antenna that has been published at present, studies broadband matching technology, and explores the design of wideband small size cell antenna. Two miniaturized wideband antenna design schemes are proposed. Based on the analysis of existing schemes, the feasibility of broadband antenna design in small space is studied, which can pave the way for the design of mobile phone MIMO antenna. Then, based on the verified element antenna, the MIMO antenna combination design is completed, and the performance of the unit antenna in the multi-antenna system is explored, and the antenna design parameters are deeply analyzed. Ensure that the antenna unit has a good impedance matching bandwidth under the multi-antenna system. At the same time, it analyzes the existing decoupling schemes, discusses the advantages and disadvantages of various decoupling techniques, studies more practical decoupling strategies, and applies the decoupling techniques with good decoupling performance to the scheme, and simulates and optimizes the MIMO antenna performance. Complete the antenna testing and experimental data analysis. The results show that the design scheme is stable, compact, applicable and can be used in the design of MIMO antenna of mobile phone. Secondly, the interaction between human body and antenna is studied in this paper. A full-wave simulation model is established according to the usage habits of mobile phones, and the effects of different working modes and head on the antenna of mobile phone are analyzed. By summarizing the mechanism of interaction between mobile phone and human body, a more reasonable configuration of mobile phone MIMO antenna is studied in the future. Finally, this paper summarizes the design of mobile phone MIMO antenna from the aspects of bandwidth expansion and decoupling technology, and analyzes the feasibility of the scheme. Based on the overall research of antenna performance and the performance of different operating environments, the key points of the design of broadband compact mobile phone MIMO antenna are summarized.
【學(xué)位授予單位】:電子科技大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TN929.5
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